Bolt-clipper.



PATENTED JUNE 27, 1905.

H. K. PORTER. BOLT CLIPPER.

APPLICATION FILED JAN. 30,1904.

NITED STATES lPatented June 2'7, 1905.

HENRY K. PORTER, OF CHELSEA, MASSACHUSETTS.

BOLT-CLIPPER.

SPECIFICATION forming part of Letters Patent No. 793,394, dated June 27,1905.

Application filed January 30, 1904. Serial No. 191,278.

To all whom, it may concern:

Be it known that I, HENRY K. PORTER, a citizen of the United States,residing at Chelsea, in the county of Sufiolk and State ofMassachusetts, have invented a new and useful Improvement inBolt-Clippers, of Whichthe following is a specification.

My invention relates to the class of compoundlever bolt-clippers ofwhich I have made and patented a number of kinds, and which in this caseconsists in certain details of construction and novel combinations ofparts whereby fine adjustments and useful results are obtained byimproved means, and which construction is illustrated in theaccompanying drawings, in which- Figure 1 is a plan showing, reduced insize, the cutting-jaws and a portion of the handles with their pivotalconnections and as em bodying my invention. Fig. 2 is a plan of one ofthe jaws, of full size, (shown in Fig. 1,) with a cross-section of thebolt which unites it with the handle and the separate eccentric-disksecured thereon. Fig. 3 is an edge view of the same, partly in section,and showing the bolt in elevation. Fig. 4 is a cross-section on line 4,Fig. 1, and showing two forms of interlocking adjustment of the bolt andeccentric-disk. Fig. 5 is a similar section showing a plain bolt passedthrough a section of the handle and the eccentric-disk and jaw andarranged to clamp said parts between the head of the bolt and the nut,and thereby to secure the eccentric in adjustment in the jaw by frictionproduced by tightening the nut. Fig. 6 is a plan, and Fig. 7 a sectionaledge view, of a toothed and recessed washer which may be employed underthe head of the bolt, as shown on the right in Fig. 4.

This tool comprises a pair of jaws or cutterlevers A and A, formed withcutting edges B and B and interlocking edge teeth, the jaws being boundtogether by straps C on opposite sides, secured thereto by pivotal boltsl) I), all such as I have heretofore constructed. The actuated ends ofthe cutter-levers are connected with the handle-levers E and E. Thesehandles are centrally pivoted together by a bolt F in a manner alsoheretofore used by me. The adjustable connections by which thejaw-levers A A are connected with the handle-levers E E at E and Ecomprise in themselves and their combinations the principal novelfeatures of my present invention. The branch E of handle E is forked, asshown in Fig. 4, and a raised circular rim of teeth G is formed thereon,with which a corresponding circle of teeth G, formed on the under sideof the hexagonal bolt-head H, engage and are securely interlockedtherewith by the tightening of the nut H. By these interlocking teeththe position of the eccentric I around the axis of the bolt H is fixedand regulated in the actuated end A of the jaw, and such position ischanged by slackening the nut far enough to raise the bolt-head teethclear from the handle-teeth and then turning the bolt to any desiredposition and dropping its teeth into contact with the handle-teeth againand securing it, as before, by tightening the nut H. Thus the relationsof the cutting edges B B are varied and adjusted as may be desired. Theeccentric-disk I, as shown clearly in Fig.2, may be secured by thegroove in the body of the bolt H either by a key fitted partly in theeccentric and partly in the groove in a well known manner or by aninterior rib I on the eccentric, fitted, as shown, in the groove H Amethod of securing the parts together by friction is illustrated in Fig.5, in which the eccentric I is made slightly thicker than the jaw A inwhich it plays and is therefore pinched firmly in the fork E of thehandlelever by the tightening of the nut H, and thereby frictionallyheld by clamping, no interlocking teeth being employed in this case.

From the foregoing it will be'apparent, owing to the fact that theeccentrics I are formed separate from the bodies of the bolts H on whichthey are mounted and to which they are keyed, that the said eccentricsmay be introduced into place through the ends of the forks of thehandle-levers and the bolts then be slipped through the eccentrics fromthe sides of the handle-levers. This construction does not, therefore,require such large openings in the handle-levers as was necessary withthe construction shown by my Patent No. 751,202, granted February 2,1904, which shows the eccentrics integral with the bodies of the bolts,so that relatively large openings in one of the forks of eachhandle-lever was neces sary to permit the eccentric to be introducedinto place through such fork and which relatively large openingsweakened the forks more than was desirable. In the new construction theopenings in the forks of the handle-levers are only of such size as isnecessary to permit the passage therethrough of the bodies of the bolts.

A differential adjustment of the jaws is obtained by the introduction ofan interlocking washer. (Shown in Figs. 4, 6, and 7.) This combinationcomprises bolt H circle of teeth G on handle E and the washer H having arim of teeth G which interlock with teeth G when the washer isinterposed between the bolt-head H and the handle E The upper side ofthe washer has a socket or hexagonal cavity H and a central hole throughwhich the body of the bolt H passes, while its hexagonal head sinks intoand interlocks with the corresponding angular socket H and is theresecured by tightening the nut H By slackening the nut and raising thehead of the bolt clear from the socket H and high enough to permit theraising of the washer, so as to disengage its teeth from the underlyingteeth on handle E an adjustment may be made of the relations of theconnected parts as follows: Turning the hexagonal head about the axis ofthe bolt to the extent of one of its sides, its shortest throw, carriesthe eccentric I around one-sixth of a revolution, thus making effectiveone-third of its eccentricity in moving the cutter-lever. Then bydropping and interlocking the head with its hexagonal seat H in thetoothed washer H and turning the two together to the extent of onetooth, its shortest throw, it will move the eccentric onefourteenth of arevolution, thus making efiective one-seventh of its eccentricity inmoving the cutter-lever. If the first movement of the bolt, as abovedescribed, is made in a forward direction and the second, together withthe washer, is made in an opposite or backward direction, the resultingadjustment of the eccentric will be an advance equal to the differencebetween one-sixth and one-fourteenth of a revolution, with acorresponding efiectiveness of its eccentricity. Thus differentialadjustments of the eccentric may be effected to any practically requireddegree of fineness for the purpose described.

I claim In a bolt-clipper, the combination of a pair of handle-levers,having teeth around their pivotal bolts; a pair of cutter-levers; a pairof pivotal bolts with angular heads; a pair of separable eccentricsattached to the bolts; a pair of adjustable Washers provided on one sidewith teeth to interlock with the teeth on the handles, and on theopposite side with an angular socket adapted to serve as a seat for, andto interlock with, the angular bolt-head; all as and for the purposesspecified.

HENRY K. PORTER.

Witnesses EUGENE I-IUMPHREY, JAMES E. LEAOH.

